Header Forge: HTTP Header & Request Editor

Modify HTTP request and response headers, redirects, and requests. No ads, no account, no subscription. Buy once.

Header Forge modifies HTTP request and response headers, redirects, and requests, right in your browser. No ads. No account. No cloud. You pay once and own it. Your rules live on your device and are applied locally with Chrome's declarativeNetRequest engine. There is no backend and nothing about your browsing is uploaded anywhere. FREE, and always functional: - Modify request AND response headers: set, add, and remove. Response-header editing is free here, not paywalled. - Up to 20 rules and 5 profiles, with per-rule and per-profile toggles and a popup quick switch. - Domain, contains, and wildcard URL matching. - Cookie and Set-Cookie header editing. - Import and export JSON, plus one-click import of your existing ModHeader and Requestly rules. When you reach the free limit, your existing rules keep running. We never lock or disable rules you already made; we only ask you to upgrade before adding new ones. PRO, a single one-time purchase (no subscription): - Unlimited rules and profiles. - Full regex URL matching with capture groups and exclude patterns. - Redirect and URL rewrite, with regex capture-group substitution. - Per-tab, per-domain, and per-window scoping. - Resource-type filtering (xhr, document, image, font, and more) and request blocking. - Priority controls for conflicting rules and export bundles. WHY PAY ONCE: The popular header editors now inject ads, force accounts, or lock you out of your own rules behind a subscription. Header Forge is a one-time purchase with none of that. Buy it once, use it forever. PRIVACY: Header Forge uses declarativeNetRequest, so it applies your rules without reading, logging, or transmitting your request and response contents. The only data that ever leaves your browser is an anonymous license check (ExtensionPay, our payment provider) and a small set of anonymous usage events (Plausible Analytics) that you can turn off in the options page. No ads, no account, no page data. Full policy: https://headerforge.mongooselabs.dev/privacy/ Works in Google Chrome and other Chromium-based browsers. Built by Mongoose Labs. Questions or feedback: support@mongooselabs.dev.